Mme Anne Louise Boivin d'Hardancourt Brillon de Jouy “Marche des insurgents,” 1778 Original owned by American Philosophical Society,  Philadelphia  Franklin's neighbor in France, Madame Brillon, wrote this piece for the armonica to celebrate a turning point for America in the Revolutionary War. Mozart and Beethoven also composed works for the instrument, though Franklin preferred simple Scottish airs.
 

Charles James Glass Armonica (English), 1761-1762 Reproduction Independence National Historical Park, gift of  Steven Lash; original in The Franklinana  Collection. The Franklin Institute, Inc., Philadelphia  The armonica's concepts is based on the sound produced by running a wet finger around the rim of a glass. Franklin noted that “of all my inventions, the glass armonica has given me the greatest personal satisfaction.” Deborah likened its sound to “the musick of angels.”